PDA

View Full Version : Where do trees come from?


Sue Vêtements
4th Sep 2016, 18:59
I mean they start off as a little seed or an acorn or something but end up as massive wooden structures. Yet all they eat is water and sunlight.

Where does all the wood come from? :confused:

meadowrun
4th Sep 2016, 19:20
Google/Bing are your friends.

Pontius Navigator
4th Sep 2016, 19:21
Your input misses the essential end product, carbon. Trees absorb carbon dioxide from the air together with nitrogen and potassium. When burnt a huge quantity of wood creates a small residue of potash so the rest is carbon dioxide release.

GordonR_Cape
4th Sep 2016, 19:21
Water + carbon dioxide + sunlight = photosynthesis.

98% of the mass of wood is carbon, oxygen and hydrogen, in the form of cellulose, lignin, etc.

ORAC
4th Sep 2016, 19:23
CHON from the atmosphere - chlorophyll is a wonderful thing. The soil only provides trace elements - otherwise wheat and other crop fields would be very deep pits indeed.

Sallyann1234
4th Sep 2016, 20:10
Take a look at a big old oak, and think for a minute how many people have lived and died while it's being growing there - empires and dynasties come and gone, world wars. And the oak has grown on regardless.

Arm out the window
5th Sep 2016, 02:33
https://youtu.be/ITpDrdtGAmoThe soil only provides trace elements - otherwise wheat and other crop fields would be very deep pits indeed.

Also how hydroponic crops can be grown without soil, seems rather magical but as mentioned above, there's carbon and hydrogen aplenty floating around in the air!

I feel slightly silly that I never realised where trees come from until a few years back where I read an article about Richard Feynman discussing this very subject - here's a link to a video of him engagingly talking about it, great that these super-smart people can still take delight in explaining a wonder like this enthusiastically and in straightforward terms the rest of us can easily grasp!

Lonewolf_50
5th Sep 2016, 05:38
Where does all the wood come from?
The wood comes from looking at pictures of Kate Upton dancing in a bikini (https://vimeo.com/41393068).

Peter-RB
5th Sep 2016, 09:46
Its really the same as, were and how does Grass grow..if someone was really skilled and worked it out..then we could stop weeds growing ..and produce just food from fields without masses of weeds in between all foods grown as well ..

The only way now to stop weeds is selective spray killing..bad for us!!;)

funfly
6th Sep 2016, 13:35
Cows are vegetarians. You can tell that from the smell of their farts - very much the same as all vegetarians.

G-CPTN
6th Sep 2016, 13:39
Do vegetarians do cowpats?

Checkboard
6th Sep 2016, 13:43
Only if the cow is cute. :)

angels
6th Sep 2016, 18:48
I read the other day that the shark was more or less what it is today before trees had evolved.

I don't want to Google it because I want to believe it!

Cazalet33
6th Sep 2016, 19:25
http://www.youtube.com/watch?v=2KZb2_vcNTg


Building limbs and trunks and the rest from air-brought nutrients is trivially simple.

The really clever bit of forests all happens underground.

http://www.youtube.com/watch?v=Un2yBgIAxYs

ORAC
6th Sep 2016, 19:30
Sorry to rain on your parade evansb, but as with many claims behind the effect of humans on the climate, there is little science behind your thesis.

How Earth´s Orbital Shift Shaped the Sahara - Astrobiology Magazine (http://www.astrobio.net/news-exclusive/how-earths-orbital-shift-shaped-the-sahara/)

There is, I will give you, a hypothesis that agriculture stopped the world descending into another ice age - the glaciers should be over the whole of the UK as we speak - but as with many such ideas, it remIns just a hypothesis.

funfly
6th Sep 2016, 19:38
It's easy to forget that the Earth throughout its histiry has spent more time devoid of ice than with ice cover even at the poles.
Where I live in Cheshire we only have to go back 12,000 years to have a situation where we had over 100meters of ice cover. (humans were around then)
We only have to go back a lot longer and this same area of Cheshire was situated roughly at the equator.
Rain Forests, a much talked about phenomenon, have only been here less than a million years - they are quite a recent event.
If you look across the Bristol Channel at Long Island and Short Island you will see they have flat tops at around 100ft. above sea level (as does the land on iether side of the channel). These flat tops were at sea level last time the ice caps melted.
Let's get things in perspective chaps.

fltlt
6th Sep 2016, 20:12
My Dear ORAC; Oh my. Are you a glider pilot? Ever ride the thermals above a barren field and then descend suddenly over a forested area? All climate is local. All air masses are global. The annual Hurricane season in the Caribbean originates from what area again? Inform me. I'm keen to guess. And because? There are proven subtle effects and impacts of cultivation on microclimates, particularly in semi-arid regions, of which I am a specialist. Regarding advection currents of cultivated and uncultivated fields. I've spent 40 years in the field of meteorology and climatology. What have you done?

I REITERATE, I'VE SPENT 40 YEARS IN THE STUDY OF METEOROLOGY IN ONE OF THE MOST UNSTABLE WEATHER AREAS OF THE WORLD. I AM A GLIDER PILOT AND SOAR ABOVE THE FOOTHILLS OF THE ROCKY MOUNTAINS OF NORTH AMERICA. WHAT HAVE YOU EXAMINED, RESEARCHED, DONE OR EXPERIENCED THAT MAKES YOUR OPINION VALID? I HAVE SPENT SIX YEARS NORTH OF 60 DEGREES LATITUDE, OF WHICH 3 YEARS WERE SPENT NORTH OF THE ARCTIC CIRCLE SOUNDING THE UPPER ATMOSPHERE WITH RADIOSONDES..
3 OF THOSE YEARS ALSO INVOLVED DAILY SNOWFALL SURVEYS WHICH INVOLVED DEPTH, CRUST, DENSITY AND WATER CONTENT ANALYSIS.

Don't know what he's done, but I have listened to the never ending doom and gloom predictions, none of which have come true, and in my humble small cap opinion, never will.

And yes, gliders and fixed wing, small caps.

For the thousandth time, get over yourselves, make solid predictions, starting with the weather for a few years then folks may, may think you might be able to predict 50, 100+ years into the future, chuckle.

Oh, and if you haven't noticed, your caps key appears to be stuck.
Maybe fix that before you think about fixing anything else.

Respectfully,

Small caps.

fltlt
6th Sep 2016, 21:33
To sum up my position, it has been my actual and verifiable experience based on historical, empirical and oral history, (yes, I understand oral history is the weakest link, however the original people of Canada's Arctic do not have much of a written history. The existing oral history of the last three hundred years has proven to be quite accurate, especially concerning climate, wild life population and migration, forest/tundra fires, earth quakes and tsunamis/tidal waves.) that what man-kind may think of as inconsequential things, such as the near entire deforestation of central North America for agriculture, does, indeed have a "large" effect on climate. "Large"? You bet. Tornados were hitherto unknown to central Canada until the 1920s, (based on 300 years of oral history and only a mere 100 years of written history )which was the peak of "clearing for agriculture" in said area. Tornados are now considered an anticipated event every summer. Effects of radiation and heat sink alteration can and does have an effect on climate on a large land mass, such as central North America, resulting in a thermal effect on the air mass(es) under which it lays. The air mass characteristic, so altered, goes on to have a domino effect. This is NOT the "butterfly flaps it's wings theory". It is the 7 trillion BTU theory.

Few people acknowledge or realize that the "clearing" of land in central North America for agriculture in the 1800's was the largest environmental modification in history, up until the recent deforestation of Indonesia and the central Amazon. Current theories for the Mayan decline is thought to originate in the cutting down of trees, thereby reducing the daily rainfall on the vegetable crops. The Mayans had good reasons to cut down trees. AKA "Bronze Age deforestation of North Africa".

And Scene!

P.S. It is clear I love talking about weather. Perhaps there should be a "weather thread" Dont'cha think?

If climate change can eradicate the B2 sized mosquitos swarming Lake Winnipeg every year I'm all for it.
OFF doesn't cut it, might try 88mm next year.

fltlt
6th Sep 2016, 21:50
Re: UPPER CASE. As a pilot, I read all NOTAMS and METARS in UPPER CASE. I don't consider the authour of said NOTAM or METAR to be angry at me, it is just that in the LARGE scheme of things, lower case is often quickly over-scanned and forgotten, leaving the UPPER CASE crying for ATTENTION. That is it. I am not angry at all. I am all for polite discourse.

To sum up my position, it has been my actual and verifiable experience based on historical,(written), empirical and oral history, (yes, I understand oral history is the weakest link, however the original people of Canada's Arctic do not have much of a written history. The existing oral history of the last three hundred years has proven to be quite accurate, especially concerning climate, wild life population and migration, forest/tundra fires, earth quakes and tsunamis/tidal waves.) that what man-kind may think of as inconsequential things, such as the near entire deforestation of central North America for agriculture, does, indeed have a "large" effect on climate. "Large"? You bet. Tornadoes were hitherto unknown in central Canada until the early 1915's, (based on 300 years of oral history and only a mere 100 years of written history )which was the peak of "clearing for agriculture" in said area. Tornados are now considered an anticipated event every summer on Canada's Prairies. The effects of solar radiation and heat sink alteration can and does have an effect on climate on a large land mass, such as central North America, resulting in a thermal effect on the air mass(es) over-lying it.. The air mass characteristic, so altered, goes on to have a domino effect. This is NOT the "butterfly flaps it's wings theory". It is the 7 trillion BTU theory.

Few people acknowledge or realize that the "clearing" of land in central North America for agriculture in the 1800's was the largest environmental modification in history, up until the recent deforestation of Indonesia and the central Amazon. Current theories for the Mayan decline is thought to originate in the cutting down of trees, thereby reducing the daily rainfall on the vegetable crops. The Mayans had good reasons to cut down trees. As a grand civilization, it may have been their demise..
Sounds similar to the "Bronze Age deforestation of North Africa" doesn't it?

And Scene!

P.S. It is clear I love talking about weather. Perhaps there should be a "weather thread" Dont'cha think?

Here you go evan, just for you:

http://m.desertdispatch.com/news/20160905/future-climate-change-field-test-doesnt-make-earth-greener

alwayzinit
7th Sep 2016, 17:08
Just wondering whether any of the "Boffins" have thought about or factored in the explosion in the human population in the last 116 years, 1.6 billion in 1900 to 7 billion plus now, into their equation for "increasing" levels of CO2.

Avitor
7th Sep 2016, 17:31
The Global Warming wallahs are attempting to kill them all off. :=

fltlt
7th Sep 2016, 21:05
Don't know if anyone else has noticed the increasing tempo of pro AGW articles/blogs, etc., it's election time, get out the vote, for the children.

Pinky the pilot
8th Sep 2016, 07:33
Don't know if anyone else has noticed the increasing tempo of pro AGW articles/blogs, etc

Not to mention the increasing doom/gloom/hysterical premonitions that seem to be appearing in the Media.

LowNSlow
8th Sep 2016, 07:48
evansb I've seen giant clam fossils and petrified tree trunks in the Sahara 300km south of the Gulf of Sirte so I assume they weren't wiped out by early humans!